Machine for forming bars or rounds from metal plates.



S. MGCLOUD.

MACHINE EOE EOEMING BARS 0E EoUNDs EEoM METAL PLATES.

v APPLICATION FILED 909,644.

Patented Jan. 12, 1909.

) l WWII".

l MCG/L s. MGCLOUD. l MAGHINE FOR EORMING BARS 0R ROUNDS FROM METALPLATES.

APPLICATION FILED MAR. 30, 1908.

Patented Jan. 12, 1909.

2 SHEETS-SHEET 2.

l; Mana/f MAW Mx@ SIDNEY MCGLOUD, OF CHICAGO; ILLINOIS'.

MACHINE RORFOR'MING :BARS` 0R: ROUNDS FROM METAL PLATES.

Naseem,

Specification of Letterslatent;

Patented Jan. 12, 1909.

Applcation-ledbfarh 30, 1908. Serial'Nb. 424,038.

To all.' whom. 'it may. concern.:

Be it knownthat I, SIDNEY MoCLoUD, a citizenofr the UnitedStates, and aresident of; Chicago, Cook. county, Illinois, have. in

vented certain new and useful Improvements. in Machines for Forming Barsor Rounds:V from Metal Plates, of which the following is a description.

My. invention has for its object the production of. a machine for.rolling. bars or rounds from metal plates, from which bars or roundssprings or other articles may be formed, and: which are much strongerand more durable than the material out of which said articles are madeat the present time.

Itis a well known fact that the bars from which springs or the like areat present made are not of exactly the same composition throughout,there being spots which contain too much or too little carbon, and wherethereisA an excess ofA carbon the material is more brittle: and willvbreak more; readily, thereby rendering. the bar, or the. article formedtherefrom, useless. For the purpose of. overcomingl this difficulty Ihave designed aA machine for formingA bars or rounds from. metal platesby rolling or winding. said plates aroundthemselves.

In carrying out this invention I contemplate rolling a single plate uponitself or rolling a pluralit of plates together. As will be observed 1nthe drawing when the bar. is completed it is composed of a pluralityoflayers,.and in case of a shock or jar suiiicient to break the bar at aweak spot, one la. er only will be broken and the remainder ofy thelayers will remain intact, and. the bar isnot materially weakened. Themetal out of which these bars or rolls are made being. wound or. wrappedat a heat which does not weld: the same together allows a modicumoffriction between the layers, thereby producing a bar of greatercompression andtensile strength.

In the accompanying drawings forming part of this specification, and 'inwhich like letters of reference indicate corresponding parts I haveillustrated one form of device illustratin the principle of myinvention, although t e same may be carried into effect in. other wayswithout departing from the spirit thereof, and in' thesedrawings: Figure1 is a top plan view of a machine embodying my invention; Fig. 2 is avertical longitudinal section taken through the center of Fig. l; Fig. 3is a sectional View taken on the line 3 3 of Fig. l; F ig. 4L is asectional view taken on the line 1-4 of Fig. l; Fig. 5 isa sectionalview taken on the line 5 5 of Fig. 1; Fig. 6 is a sectional view takenonthe line 6--6 of Fig. l; Fig. 7 is a perspective view of a bar orvround formed by winding a plate of metal spirally upon itself.

Upon the bed A of the machine and within suitable journal bearings aresustained the rolls B and C, which receive the plates of' metal fromwhich the bars or rounds are to be'formed, and which give to such platesa concavo-convex shape when passed. therethrough.

The roll B is preferably of spherical'contoursand the roll4 C has itsperiphery formed with a groove corresponding in outline to the surfaceofthe roll B. These rolls B and C are driven by suitable gearing,arranged. in any wellv known manner.

After the. plate has passed through the rolls B and C and has been bent.transveasely of the plate, it passes into a former by which a. furtherbending. is effected, as hereinafter described.

D is a guide supported above. the bed A of the machine, and whichextends above the.

path of the plate D as it leaves the rolls B and At the end of thisguide D are the forming rolls E, E. The roll E is provided upon theperiphery thereof with a groove corresponding in outline to the bottomof the plate D after it has been bent to the concave-convex form by therolls B and C.

The roll E is provided upon the periphery thereof with twocircumferential grooves, one of which is smaller than the other. As themetal plate D leaves the bending rolls B and C it passes between theforming rolls E, E', the edges e, e of said plate being turned inwardlyby the grooves upon the former E, and folded so that one edge overlapsthe other, as shown more clearly in t the rear of the forming. rolls E,E', I have arranged. a. pair of reducing rolls F, F', which aresupported vertically in suitable bearings above the .bed A and which aredriven by appropriate gearing. Each of said rolls has a circumferentialgroove f f', throughwhich the curved plate 1s passed as shown moreclearl in Fig. 5. The curved metal plate is furt er turned upon itselfbetween these rolls and crowded more closely to ther. The com ressingand finishing ro ls G, G', are suita ly mounted at the rear of themachine and are arranged at a roger distance from the reducin rolls F,These rolls are provided wit ooves g, g u on the periphery thereof. Ater the metal p ate has been formed into a s iral and is passed to thefinishing rolls the ayers of the metal plate are wound closely togetheras shown at H in Fig. 6 so that as the bar leaves the machine it iscoiled as shown in Fig. 7. The different rolls may be made adjustablewith relation to each other in any desired vscope of my invention toform such manner so that when itis desired to roll a bar or round ofmetal which shall not be tightly coiled upon itself as shown in Fig. 7the sald metal plate may be wound so that a hollow is left in the centerthereof throughout the entire length of the bar.

Fromthe foregoin descri tion it will be seen that the platepo metal romwhich the bar or round is to be formed passes throu h a plurality ofstages in which it is gradua y 'bent from a flat plate to aconcave-convex form, after which its edges are bent so that by pressurethey will overlap each other, after which it is passed throu h thereducing rolls and the metal more close y wound upon itself. Thecompressin and finishing rolls then press the coils oft e metal plateuntil the finished article is produced as shownin Fi .'I.

'Ihe precise details of construction above set out may be varied withoutdepartinflr from the spirit of my invention and to such details,therefore, I do not Wish the invention to be understood as restricted.Thus, for example, while I have shown the rolls E as formed with twogrooves, such roll might be formed with a single groove withoutdeparting from the spirit of my invention. SoV also,

'while I prefer that the circumferential grooves correspondin to theturned edges e, e of the former s ould be formed in a roll, I wouldstill regard it as within the grooves in a non-revoluble body.

I claim: Y 1. Ina machine of the character described the combination ofrolls for bending a metal plate transversely, means for curving the sameto overlap the ed and means for further curving and re ucin the platetothe form of a coil, as set forti. 2. In a machine of the characterdescribed,

-the combination of means for bendin a metal plate transversely, meansfor furt er curving the ,same to overlap the edges, and

reducing rol-ls for coiling said plate tightly es upon itself.

3. In a machine of the character described, the combination of means forbendi a metal plate transversely, means for furt er curving the same tooverlap the edges, and reducing rolls for coilingrsaid plate into aYsubstantially solid bar. Y

4. In a machine of the character described, il I forming rolls, a rollhaving ooves of difa machine of the character described, 'y

ferent outline to overlap the e ges of a metal Y plate, and means forfurther curving and reducing said plate to a tivhtly coiled ar. Y

6. In a machine, of the character described, the combination of rollsfor im arting a transverse curve to a metal-plate, t e former having adouble grooved roll to unequully p overturn the edges of saidY plate,and means for wrappin said metal upon itself into a tightlly coil bar.

7. n a machine of the character described, the combination of a formerfor unequally overturning the edges of a metal late, and curving andreducing rolls for coiling said plate upon itself into a substantiallysolid form.

8. In a machine of the character described the combination of bendingrolls for metal plates, forming rolls for curvin of said plate towardseach ot er, an a plurality of sets of reducin and finishing rolls forfurther coiling sai plate u on itself into a substantiall solid piece ometal.

9. In a machine of t e character described, the combination of thebending rolls for metal plates, a ide at the rear of said rolls, formingrolls or turnin the ed es of the metal to overlap each ot er, an reducinand finishing rolls for further coiling saiV plate u on ltself into asubstantially solid piece o metal.

10. In a machine of the character VVdescribed, the'combination ofbending rolls for metal plate, a guide holding the plate in position,grooved rolls for partially'coiling the edges of said late to overlapeach other, and reducing an finishing rolls for further coiling saidplate into a substantially solid piece of metal. f

11. In a machine of the character described, the combination of, aformer for curving a late of metal, a guide holding the plate to t e bedof the machine, rolls for initially coiling said plate, and means forVrolling said plate upon itself into a substantially solid piece ofmetal.

12.7In a machine of the character described, the combination of rollsfor bending VlllV a metal plate transversely, a former coml In testimonywhereof I have hereunto prisinga roll having circumferential groovessigned this specification in the presence of 1o upon thlJ perifhrg.gthereof, onefof salild two subscribing Witnesses.

rooves ein o i erent contour rom t e T ther, said oll adapted tooverturn the SIDAEY MCCLOUD-f edges of said plate, and means forcoiling, Witnesses: reducing and compacting said plate into a F. H.KING, I substantilly solid piece of metal. CHARLES I. COBB.

